Was trying to do an endless runner parallaxing background, I tried using the infinite runner template, adding some backgrounds and making the script for them, changing the parallax on their new separate layers, and then changed the bullet speeds on each, it looks good with one exception, now it has an odd skip, anyone have any ideas on how I might do this better?

I made an addon (behavior) and a template that implement parallax backgrounds for side-scrolling games, it will work out of the box with your game.

I recommend getting the addon. You simply add the behavior to a TiledBackground object and it will scroll horizontally as you move through the layout. You can also configure it to make it scroll continuously. I made a detailed manual that explains these scenarios in detail.